Fix color picker closing on mouse leave

[Nityam43]

Title: fix: prevent color picker from closing on mouse leave

📝 Summary

Resolves #1147 by removing the onMouseLeave event handler from the ColorPicker wrapper.

🛠️ Changes Made

• Removed onMouseLeave={handleColorPick} from the outer div.
• The color picker now remains open when dragging the cursor outside its boundary to select edge-case colors on the canvas.
• Intentional commits and outside clicks are still properly handled by the existing onPointerUp and onBlur events.

Closes #1147

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